<template>
    <div class="goodsinfo-container">
        <!-- 小球动画 -->
        <transition @before-enter="beforeEnter" @enter="Enter" @after-enter="afterEnter">
            <div class="ball" v-show="ballFlag" ref="ball"></div>
        </transition>

        <!-- 商品轮播图区域 -->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <swiper :lunbotuList="lunbotu" :isfull="false"></swiper>
                </div>
            </div>
        </div>

        <!-- 商品购买区域 -->
        <div class="mui-card">
            <div class="mui-card-header">{{goodsinfo.title}}</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p class="price">
                        <span>市场价:<del>￥{{goodsinfo.market_price}}</del></span>&nbsp;&nbsp;
                        销售价:<span class="now_price">￥{{goodsinfo.sell_price}}</span>
                    </p>
                    <p>
                        购买数量:<numbox @getCount="getSelectedCount" :max="goodsinfo.stock_quantity"></numbox>
                    </p>
                    <p>
                        <mt-button type="primary" size:small>立即购买</mt-button>
                        <mt-button type="danger" size:small @click="addToShowCar">加入购物车</mt-button>
                    </p>
                </div>
            </div>
        </div>

        <!-- 商品参数区域 -->
        <div class="mui-card">
            <div class="mui-card-header">商品参数</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p>商品货号:{{goodsinfo.goods_no}}</p>
                    <p>库存情况:{{goodsinfo.stock_quantity}}件</p>
                    <p>上架时间:{{goodsinfo.add_time | dateFormat}}</p>
                </div>
            </div>
            <div class="mui-card-footer">
                <mt-button type="primary" size="large" plain @click="goDesc(id)">图文介绍</mt-button>
                <mt-button type="danger" size="large" plain @click="goComment(id)">商品评论</mt-button>
            </div>
        </div>
    </div>
</template>

<script>
    import swiper from '../subcomponent/swiper.vue'
    import numbox from '../subcomponent/goodsinfo_numbox.vue'
    export default {
        data() {
            return {
                id: this.$route.params.id, //将路由参数对象中的id挂在到对象上
                lunbotu: [],
                goodsinfo: [], //获取到的商品信息
                ballFlag: false, //控制小球隐藏显示标识符
                selectCount: 1 //保存用户选中的商品数量
            }
        },
        created() {
            this.getlunbotu();
            this.getGoodsinfo();
        },
        methods: {
            // 获取轮播图数据
            getlunbotu() {
                this.$http.get('api/getthumimages/' + this.id).then(result => {
                    if (result.body.status == 0) {
                        result.body.message.forEach(item => {
                            item.img = item.src;
                            this.lunbotu = result.body.message;
                        })

                    }
                })
            },
            // 获取商品信息
            getGoodsinfo() {
                this.$http.get('api/goods/getinfo/' + this.id).then(result => {
                    if (result.body.status == 0) {
                        this.goodsinfo = result.body.message[0]
                    }
                })
            },
            // 跳转图文详情
            goDesc(id) {
                this.$router.push({ name: 'goodsdesc', params: { id } });
            },
            goComment(id) {
                this.$router.push({ name: 'goodscomment', params: { id } });
            },
            //添加购物车
            addToShowCar() {
                this.ballFlag = !this.ballFlag;
                var goodsinfo = {
                    id: this.id,
                    price: this.goodsinfo.sell_price,
                    count: this.selectCount,
                    selected: true
                }
                this.$store.commit('addToCar', goodsinfo);
            },
            // 动画开始
            beforeEnter(el) {
                el.style.transform = "translate(0,0)"
            },
            Enter(el, done) {
                el.offsetWidth;
                // 获取小球在页面中的位置
                const ballPosition = this.$refs.ball.getBoundingClientRect();
                // 获取徽标在页面中的位置
                const badegPosition = document.getElementById("badeg").getBoundingClientRect();
                const xDist = badegPosition.left - ballPosition.left;
                const yDist = badegPosition.top - ballPosition.top;

                el.style.transform = `translate(${xDist}px, ${yDist}px)`;
                el.style.transition = "all 1s cubic-bezier(.4,-0.3,1,.68)";
                done();
            },
            afterEnter(el) {
                this.ballFlag = !this.ballFlag;
            },
            // 动画结束
            getSelectedCount(count) {
                // 当子组件把选定的数量传递给父组件goodsinfo的时候,把选中的值传递到data上
                this.selectCount = count;
            }
        },
        components: {
            swiper,
            numbox
        }
    }

</script>

<style lang="scss" scoped>
    .goodsinfo-container {
        background: #eee;
        overflow: hidden;

        .now_price {
            color: red;
            font-weight: bold;
            font-size: 16px;
        }

        .mui-card-footer {
            display: block;

            .mint-button {
                margin: 15px 0;
            }
        }

        .ball {
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: red;
            position: absolute;
            top: 390px;
            left: 140px;
            z-index: 11;
        }
    }
</style>